"The Itech® HC100 Pro hockey helmet is constructed with a tough, 2-piece shell and a Pro gel foam comfort liner for dependable protection. Strategic vent locations offer enhanced airflow, increased ventilation and Pro-level performance. This helmet includes removable ear pieces and an adjustable chin strap."

Features:

2-piece shell with parabolic adjustment
Lightweight, high-impact absorbing EPP liner
Pro gel foam comfort liner
Strategic vent locations
Removable ear pieces (Please note: removal of earpiece voids CE, CSA and HECC certifications)
Adjustable chin-strap

Medium is Head Size is 6 7/8 - 7 3/8 or 21" - 23" circumferance